Coniferous forests typically occur in broad bands at latitudes to the north of the Great Lakes. How, then,?

Coniferous forests typically occur in broad bands at latitudes to the north of the Great Lakes. How, then, would you explain the presence of similar forests in California and West Virginia?

A. They occur only in regions with sandy soil.
B. They occur only in mountainous regions at higher elevations, where average temperatures are lower.
C. They occur only in areas with very low rainfall.
D. They occur only in areas that have similar animal species.